Limit to Heisenberg in Temporal Physics
Limit to Heisenberg
consider
Δx⋅Δp≥ ℏ/2c
Modified Schrödinger Equation
In a potential-free region, the modified Schrödinger equation is:
i ℏ ∂ψ/∂t = -ℏ² / [2m (1 + α t²)] ∇²ψ
Deriving the Uncertainty Relation
Wavefunction Form:
Assume a plane wave solution for the wavefunction ψ:
ψ(x, t) = A e^(i (k x - ω t))
where k is the wave number and ω is the angular frequency.
Momentum and Energy Operators:
The momentum operator in quantum mechanics is:
p̂ = -i ℏ ∂/∂x
For a plane wave, the momentum is:
p = ℏ k
The kinetic energy operator is:
T̂ = -ℏ² / [2m (1 + α t²)] ∇²
For a plane wave, the kinetic energy is:
T = ℏ² k² / [2m (1 + α t²)]
Uncertainty in Position (Δx):
For a plane wave, the position uncertainty Δx is related to the wave packet's spatial extent. For simplicity, consider a Gaussian wave packet where:
Δx ≈ 1 / (√2 k)
Uncertainty in Momentum (Δp):
The uncertainty in momentum Δp can be derived from the relation:
Δp ≈ ℏ k
Uncertainty Product:
The product of uncertainties Δx ⋅ Δp is:
Δx ⋅ Δp ≈ [1 / (√2 k)] ⋅ (ℏ k) = ℏ / √2
Note: This derivation assumes a Gaussian wave packet for simplicity. For a more accurate calculation, integrate over the actual probability distribution of the wave packet.
Including the Modified Schrödinger Equation Scaling:
The modified uncertainty relation should take into account the scaling factor in the kinetic energy term:
Δx ⋅ Δp ≈ ℏ / [2] ⋅ 1 / (1 + α t²) = ℏ c / [2] ⋅ 1 / (1 + α t²)
Compare with the Modified Uncertainty Principle:
The modified uncertainty principle is:
Δx ⋅ Δp ≥ ℏ / [2c]
To ensure consistency:
ℏ c / [2] ⋅ 1 / (1 + α t²) ≥ ℏ / [2c]
Simplify:
c / (1 + α t²) ≥ c
Which is:
c ≥ c (1 + α t²)
To satisfy this condition, we need:
c / (1 + α t²) ≥ c
This implies:
1 / (1 + α t²) ≥ 1
Since α t² ≥ 0, this condition holds true if α t² is small or zero. In physical scenarios where α t² is small compared to 1, the inequality holds, ensuring that the modified Schrödinger equation is consistent with the modified uncertainty principle.
Comparison with Planck Time
Planck Time:
Value: 𝑡_𝑃≈5.39×10^−44
Relation: Planck time is a fundamental unit of time where quantum effects of gravity are expected to become significant.
Modified Uncertainty Bound:
Value: ℏ/2𝑐≈1.76×10^−43m⋅kg⋅m/s
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